KR101936665B1 - Radio frequency circuit, transmitter, base station and user terminal - Google Patents

Abstract

Embodiments of the present invention provide a radio frequency circuit comprising a first circuit and a second circuit. The first circuit receives the first signal and the second signal, divides the first signal into a third signal and a fourth signal, splits the second signal into a fifth signal and a sixth signal, Wherein the second circuit comprises a first power amplifier branch and a second power amplifier branch, and wherein the second circuit comprises a first power amplifier branch and a second power amplifier branch, The secondary power amplifier branch comprises an outphasing circuit, the secondary power amplifier branch comprises a secondary power amplifier, the outphasing circuit is configured to process the fourth signal and the sixth signal, 8 < / RTI > signal. In a radio frequency circuit provided in an embodiment of the present invention, the second circuit of rated power can reach peak efficiency to meet real application requirements.

Description

RADIO FREQUENCY CIRCUIT, TRANSMITTER, BASE STATION AND USER TERMINAL,

The present invention relates to the field of communications, and more particularly to radio frequency circuits, transmitters, base stations and user terminals.

At a wireless base station, the energy consumption of a radio frequency power amplifier accounts for a very high percentage of the total energy consumption of the base station device. To reduce energy consumption, Doherty (DHT) circuits, which include dual input radio frequency circuits, such as outphasing circuits, or a primary power amplifier and a secondary power amplifier, . However, when a conventional dual input radio frequency circuit is used to improve the back-off efficiency, the efficiency between the power back-off point and the high power point can be significantly reduced. Finally, the efficiency of a device such as a base station for outputting modulated waves is affected.

In order to improve the significantly reduced efficiency of the dual input radio frequency circuit, the prior art combines the DHT circuit and the outpaging circuit to form a composite radio frequency circuit. That is, an outphasing circuit is used as a primary power amplifier of the DHT circuit, and then a load modulation is performed by adding a secondary power amplifier. The composite radio frequency circuit can effectively improve the significantly reduced efficiency of the dual input radio frequency circuit between the power back-off point and the high power point. However, the number of input signals of the dual input high-frequency circuit increases from the original two to three, resulting in an excessively large size of the complex high-frequency circuit as a whole. Further, in order to provide three input signals to the composite radio frequency circuit, it is necessary to arrange three transmission channels in the composite radio frequency circuit. Thus, complex radio frequency circuits are relatively expensive to use and are undesirable for large scale applications and dissemination.

In order to reduce the number of transmission channels, in a conventional general method, signals transmitted through two transmission channels are converted into three input signals by performing operations such as division or combination, and the three input signals are converted into a composite radio frequency circuit . However, after obtaining three input signals using this method, when the signal transmitted over the two transmission channels is adjusted, at least one input signal can not be adjusted to the expected value. As a result, the synthesized high-frequency circuit at the rated power can not reach the optimum power amplification efficiency, and the overall performance of the circuit is poor.

Embodiments of the present invention provide a radio frequency circuit capable of achieving optimal power amplification efficiency. Embodiments of the present invention further provide a transmitter, a base station, and a user terminal.

According to a first aspect, an embodiment of the present invention provides a radio frequency circuit, the radio frequency circuit comprising a first circuit and a second circuit, the first circuit receiving a first signal and a second signal Dividing the first signal into a third signal and a fourth signal, dividing the second signal into a fifth signal and a sixth signal, adjusting the phase of the fifth signal to obtain a seventh signal, The second circuit comprising a primary power amplifier branch and a secondary power amplifier branch, wherein the primary power amplifier branch comprises an outphasing circuit, The secondary power amplifier branch includes a secondary power amplifier and the outphasing circuit is configured to process the fourth signal and the sixth signal and the secondary power amplifier is configured to process the eighth signal.

In a first possible implementation of the first aspect, the first circuit further comprises a microstrip, wherein the microstrip is configured to adjust the phase of the fifth signal, the length of the microstrip being a phase of the fifth signal It is directly proportional to the shift.

In a second possible implementation of the first aspect, with reference to the possible embodiments described above, the first circuit further comprises an attenuation network and a combiner, the attenuation network being configured to attenuate the seventh signal and the third signal, And the combiner is configured to combine the attenuated seventh signal and the attenuated third signal with the eighth signal.

With reference to the possible embodiments described above, in a third possible implementation of the first aspect, the first signal and the second signal are obtained by performing a phase decomposition on the modulated signal, comprising:

이고, 제2 신호의 위상은

이고,

의 값 범위는 0°내지 90°이고 제1 신호의 진폭은 제2 신호의 진폭과 같으며,

는 시간 관련 함수이고, t≥0이며, t는 시간을 나타낸다.The phase of the first signal is

And the phase of the second signal is

ego,

Is in the range of 0 to 90 and the amplitude of the first signal is equal to the amplitude of the second signal,

Is a time-related function, t? 0, and t represents time.

In a fourth possible implementation of the first aspect, with reference to any one of the above possible implementations, a secondary power amplifier configured to process an eighth signal comprises: an eighth signal from a signal input of the secondary power amplifier And when the amplitude of the eighth signal reaches a signal threshold, the secondary power amplifier begins to perform amplification processing on the eighth signal, and the signal threshold starts the secondary power amplifier And the value of the conduction angle of the secondary power amplifier is greater than 120 degrees.

According to a second aspect, an embodiment of the present invention provides a transmitter including the radio frequency circuit provided in the first aspect.

According to a third aspect, an embodiment of the present invention provides a base station comprising a transmitter provided in the second aspect, wherein the base station further comprises a communication interface, a processor, and a power supply.

According to a fourth aspect, an embodiment of the present invention provides a user terminal comprising a transmitter provided in the second aspect, wherein the user terminal further comprises memory, an external port, a radio frequency circuit, a peripheral interface, a processor, and a power supply .

Embodiments of the present invention provide a radio frequency circuit comprising a first circuit and a second circuit. The first circuit receives the first signal and the second signal, divides the first signal into a third signal and a fourth signal, splits the second signal into a fifth signal and a sixth signal, Adjust the phase to obtain the seventh signal, and combine the seventh signal and the third signal with the eighth signal. Wherein the second circuit comprises a primary power amplifier branch and a secondary power amplifier branch, wherein the primary power amplifier branch comprises an outphasing circuit, the secondary power amplifier branch comprises a secondary power amplifier, Is configured to process the fourth signal and the sixth signal, and the secondary power amplifier is configured to process the eighth signal. In an embodiment of the present invention, the different first and second signals correspond to different fourth and sixth signals, and the eighth signal can be controlled by performing a phase adjustment on the fifth signal. Therefore, the fourth signal, the sixth signal, and the eighth signal input to the second circuit can be adjusted to the optimum parameters corresponding to the second circuit, the second circuit of rated power can reach the maximum efficiency, Performance is excellent and can meet actual application requirements.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic structural diagram of a prior art composite radio frequency circuit.
2 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present invention.
Figure 3 shows an input / output characteristic curve of a particular exemplary circuit of a first circuit according to an embodiment of the present invention.
4 is a schematic structural diagram of another radio frequency circuit according to an embodiment of the present invention.
5 shows a phase-phase curve of an eighth signal in a radio frequency circuit according to an embodiment of the present invention.
6 is a schematic block diagram of a base station according to an embodiment of the present invention.
7 is a schematic structural diagram of a user terminal according to an embodiment of the present invention.

Embodiments of the present invention provide a radio frequency circuit for improving the output power and efficiency of a circuit and are described in detail below.

이고, 제2 전송 채널 상에서 전송되는 신호는

이고, 0°내지 90°의 범위의 전력 스플리터는 분할 및 결합을 수행하는 데 사용된다. 분할 후, 신호 ①은

이고, 신호 ②는

이고, 신호 ③은

이며, 신호 ④는

이다. 결합 후, 신호 ⑤는

이다.

은 제1 전송 채널 상에서 전송되는 신호의 피크이고,

은 제1 전송 채널 상에서 전송되는 신호의 위상이고,

는 제2 전송 채널 상에서 전송되는 신호의 피크이며,

는 제2 전송 채널 상에서 전송되는 신호의 위상이다. 위의 예로부터 회로 구조가 결정된 후, 제1 전송 채널 및 제2 전송 채널의 파라미터

,

,

, 및

는 신호 ① 및 신호 ③의 진폭 및 위상이 각각 항상 예상 값인 것을 보장하도록 조정되어야 한다. 결론적으로, 2차 전력 증폭기 브랜치에 입력되는 신호 ⑤의 진폭 및 위상 역시 변하지 않으며 신호 ⑤의 예상 값에 조정될 수 없다. 제1 전송 채널 및 제2 전송 채널 상에서 전송되는 신호를 조정하는 방법에 관계없이, 신호 ①, 신호 ③ 또는 신호 ⑤ 중 적어도 하나는 예상 값에 조정될 수 없다.In the prior art, the composite radio frequency circuit includes a primary power amplifier branch and a secondary power amplifier branch. Please refer to Fig. 1 for the structure of a circuit for providing an input signal to a composite radio frequency circuit. Signals transmitted on the first transmission channel are divided into signals (1) and (2), and signals transmitted on the first transmission channel are divided into signals (3) and (4). Signals (1) and (3) are used as inputs to the secondary power amplifier of the combined radio frequency circuit, and signal (5) obtained by combining signals (2) and (4) are used as inputs to the secondary power amplifier branch of the combined radio frequency circuit. Signal splitting and combining is performed by circuitry or components such as couplers and power splitters, and the division rules are dependent on the characteristics of the circuitry or components performing the division. For example, if the phase shift of the circuit providing the input signal to the composite radio frequency circuit is zero, the signal transmitted on the first transmission channel is

, And the signal transmitted on the second transmission channel is

And a power splitter in the range of 0 [deg.] To 90 [deg.] Is used to perform splitting and combining. After the division,

, And the signal (2)

, And the signal

, And the signal (4)

to be. After coupling, the signal

to be.

Is the peak of the signal transmitted on the first transmission channel,

Is the phase of the signal transmitted on the first transmission channel,

Is the peak of the signal transmitted on the second transmission channel,

Is the phase of the signal transmitted on the second transmission channel. After the circuit structure is determined from the above example, the parameters of the first transmission channel and the second transmission channel

,

,

, And

Should be adjusted to ensure that the amplitudes and phases of the signals 1 and 3 are always expected values, respectively. Consequently, the amplitude and phase of the signal ⑤ input to the secondary power amplifier branch are also unchanged and can not be adjusted to the expected value of signal ⑤. Regardless of the method of adjusting the signal transmitted on the first transmission channel and the second transmission channel, at least one of the signals?,? Or? Can not be adjusted to the expected value.

In order to solve the above-mentioned problems, embodiments of the present invention provide a radio frequency circuit. Please refer to Fig. 2 for a schematic structural diagram. Radio frequency circuit mainly:

The first signal and the second signal, dividing the first signal into a third signal and a fourth signal, dividing the second signal into a fifth signal and a sixth signal, adjusting the phase of the fifth signal, A first circuit (201) configured to acquire a seventh signal and to couple a seventh signal and a third signal to an eighth signal; And

A second circuit comprising a primary power amplifier branch and a secondary power amplifier branch, wherein the primary power amplifier branch includes an outphasing circuit, the secondary power amplifier branch includes a secondary power amplifier, The paging circuit is configured to process the fourth signal and the sixth signal and the second power amplifier is configured to process the eighth signal.

.

The first signal and the second signal are the input signals of the first circuit 201 and the different first and second signals correspond to different fourth and sixth signals. Specifically, after division, different first signals correspond to different fourth signals, and after division, different second signals correspond to different sixth signals.

The seventh signal obtained by performing the phase adjustment on the fifth signal obtained by dividing the second signal combines with the third signal obtained by dividing the first signal to form an eighth signal. Therefore, by performing the phase adjustment on the fifth signal, phase angles of different angles occur on the fifth signal, and the eighth signal can be adjusted.

This embodiment provides a radio frequency circuit comprising a first circuit 201 and a second circuit 202. The second circuit 202 of rated power can reach peak efficiency only when all three input signals input to the second circuit 202 are adjusted to the optimal parameters consistent with the second circuit 202. [ In this embodiment, the fourth signal and the sixth signal can be controlled by adjusting the first signal and the second signal, and the eighth signal can be controlled by performing a phase adjustment on the fifth signal. In this way, both the fourth signal, the sixth signal, and the eighth signal that are input to the second circuit 202 can be flexibly adjusted to the optimum parameters consistent with the second circuit 202, 2 circuit 202 can reach peak efficiency and real application requirements can be satisfied.

Optionally, the first circuit 201 further comprises a microstrip configured to adjust the phase of the fifth signal. The length of the microstrip is directly proportional to the phase shift of the fifth signal. The longer the length of the microstrip, the larger the phase shift of the fifth signal.

Alternatively, in this embodiment of the invention, a delay line, a variable capacitance diode, a phase shifter, or other circuit or component may be used to adjust the phase of the fifth signal. This is not restrictive here.

Alternatively, in another embodiment of the present invention, the first signal and the second signal may be obtained by performing phase decomposition on the modulated signal in the digital domain. The first signal and the second signal have the same amplitude and opposite phase. The amplitude and phase of the first signal and the second signal can be adjusted by adjusting the amplitude or phase of the modulated signal. The modulated signal is typically obtained by performing envelope modulation on a sinusoidal signal. When phase decomposition is performed in the digital domain, the correspondence between the amplitude of the modulated signal and the decomposed phase of the modulated signal is:

는 변조된 신호의 분해 위상의 순간 값을 나타내고,

는 변조된 신호의 진폭의 순간 값을 나타내고,

는 변조된 신호의 진폭의 피크를 나타내며,

는 시간 관련 함수이고, t≥0이며, t는 시간을 나타내며, 0°<

< 90°이다.here

Represents the instantaneous value of the decomposition phase of the modulated signal,

Represents the instantaneous value of the amplitude of the modulated signal,

Represents the peak of the amplitude of the modulated signal,

Is a time-related function, t? 0, t represents time, 0?

Lt; 90 [deg.].

As can be seen from equation (1), the decomposition phase of the modulated signal varies with the amplitude of the modulated signal. At a particular moment, the larger the amplitude of the modulated signal, the smaller the decomposed phase of the modulated signal, or the smaller the amplitude of the modulated signal, the greater the decomposed phase of the modulated signal.

보다 크지 않으며, 제1 신호의 위상은

이고, 제2 신호의 위상은

이다.After the phase decomposition shown in equation (1) is performed, the modulated signal is decomposed into a first signal and a second signal. The amplitudes of the first signal and the second signal are the same

And the phase of the first signal is

And the phase of the second signal is

to be.

The amplitude of the first signal and the amplitude of the second signal are the same. The amplitude and phase vary with time. Therefore, the amplitudes and phases of the third signal, the fourth signal, the fifth signal, and the sixth signal obtained after the division, and the seventh signal obtained by performing the phase adjustment on the fifth signal also change with time. Since the eighth signal is obtained by combining the seventh signal and the third signal, the amplitude of the eighth signal is related to the phase of the seventh signal and the third signal. A phase adjustment is performed on the fifth signal so that a different degree of shift may occur in the phase of the fifth signal, and the obtained eighth signal has a different phase-amplitude curve. See Figure 3 for a specific application example.

Figure 3 shows the input / output characteristic curves of a particular exemplary circuit of the first circuit 201. The horizontal coordinate axis represents the decomposed phase of the modulated signal, that is, the phase value of the first signal. The vertical coordinate axis represents the voltage amplitude of the eighth signal obtained by normalizing the maximum voltage value of the modulated signal. The different curves represent an eighth signal corresponding to a different phase shift of the fifth signal. Curve 1 represents the eighth signal when the phase shift of the fifth signal is zero (i.e., phase adjustment is not performed). Curve 2 represents the corresponding eighth signal when the phase shift of the fifth signal is 20 [deg.]. Curve 3 shows the corresponding eighth signal when the phase shift of the fifth signal is 40 °. For ease of comparison, the phase-amplitude curve of the modulated signal, curve 0, is also added to FIG.

Comparing Curve 2 or Curve 3 to Curve 1 shows that the amplitude of the eighth signal is smaller after the phase of the fifth signal is adjusted. Comparing curves 2 and 3, it can be seen that the amplitude value of the eighth signal can be controlled by adjusting the phase shift of the fifth signal and the amplitude of the eighth signal becomes smaller as the phase shift of the fifth signal is larger .

The second circuit 202 includes a primary power amplifier branch and a secondary power amplifier branch. The primary power amplifier branch includes an outphasing circuit, and the secondary power amplifier branch includes a secondary power amplifier. The outphasing circuit typically operates in Class B or Class AB conditions, and the secondary power amplifier typically operates in Class C conditions. When the second circuit 202 is operating, the outphasing circuit remains in an operable state, but the secondary power amplifier does not start in the initial state. The secondary power amplifier is configured such that only when the amplitude of the eighth signal input to the secondary signal input terminal reaches the minimum signal amplitude at which the secondary power amplifier can be started, that is, when the signal threshold value corresponding to the conduction angle is reached, And begins to perform amplification processing on the signal. It will be appreciated that when the amplitude of the modulated signal is relatively small, the decomposition phase of the modulated signal is relatively large, the amplitude of the eighth signal is relatively small, and the secondary power amplifier does not start. When the amplitude of the modulated signal is relatively large, the decomposition phase of the modulated signal is relatively small, the amplitude of the eighth signal is relatively large, and the secondary power amplifier starts. Therefore, the secondary power amplifier starts only when the amplitude of the modulated signal is relatively large, so that the power amplification efficiency of the circuit is improved.

In the prior art, the secondary power amplifier typically has a deep class C (i.e., the conduction angle of the secondary power amplifier is relatively small, about 100 degrees) by using a grid voltage bias, So that the secondary power amplifier starts only when the amplitude of the signal input to the secondary power amplifier reaches the signal threshold value and as the conduction angle of the secondary power amplifier becomes smaller, the signal threshold value corresponding to the secondary power amplifier . However, if the conduction angle of the secondary power amplifier is relatively small, both the saturation power and the gain of the second circuit 202 are greatly affected when the secondary power amplifier starts. As a result, the saturation power of the radio frequency circuit is relatively small, the gain curve of the circuit is greatly suppressed, and the application requirements can not be satisfied in the room. When the conduction angle of the secondary power amplifier is increased by adjusting the grid voltage bias, the signal threshold corresponding to the secondary power amplifier is reduced, and the eighth signal reaches the signal threshold only when the amplitude of the modulated signal is relatively small And thus the secondary power amplifier starts. However, since the amplitude of the input signal is relatively small, the power amplification efficiency of the radio frequency circuit is relatively low. Therefore, in the prior art, the power amplification efficiency and the saturation power of the radio frequency circuit are not balanced. The power amplification efficiency of the circuit is ensured at the expense of the saturation power and linear characteristics of the circuit.

In this embodiment, the amplitude value of the eighth signal is adjusted by adjusting the different phases of the fifth signal, and the saturation power of the circuit can be improved when the power amplification efficiency of the circuit is ensured. Specifically, first, since the amplitude of the eighth signal becomes smaller, in this embodiment, the signal threshold corresponding to the secondary power amplifier is such that when the amplitude of the modulated signal is relatively small, the eighth signal reaches the signal threshold value It can be reduced appropriately according to the guarantee that it can not. Therefore, the power amplification efficiency of the circuit is guaranteed. Second, in this embodiment, the signal threshold corresponding to the secondary power amplifier can be reduced and therefore the secondary power amplifier can be adjusted to the light class C by using the grid voltage bias of the secondary power amplifier. In the radio frequency circuit provided in the present invention, the conduction angle of the secondary power amplifier may be a value larger than 120 DEG, and may be, for example, 160 DEG have). In this way, after the secondary power amplifier is started, the saturation power of the second circuit 202 increases. As a result, in this embodiment, the saturation power of the second circuit 202 can be improved without decreasing the power amplification efficiency of the second circuit 202. [

For example, in FIG. 3, the criterion by which a microstrip or other circuit or component adjusts the fifth signal may be as follows: the first phase value is determined such that the first phase value is greater than the second phase value, 5 signal is adjusted. The first phase value is the phase value of the first signal corresponding to the intersection of the phase-amplitude curve of the eighth signal and the phase-amplitude curve (curve 0) of the modulated signal. The second phase value is the phase value of the first signal corresponding to the power back-off point of the second circuit. This allows the secondary power amplifier to be in a switch-off state during power back-off and allows it to start quickly when the power of the eighth signal is greater than the power at the power back-off point.

Based on the embodiment shown in FIG. 2, an embodiment of the present invention may further include a step of performing phase decomposition on the modulated signal such that the first signal and the second signal are configured to perform more &lt; Desc / Additional sophisticated radio frequency circuitry is provided. Referring to FIG. 4, the basic structure of a radio frequency circuit includes a first circuit 401 and a second circuit 402.

The first circuit 401 receives the first signal and the second signal, wherein the first signal is obtained by performing a phase decomposition on the modulated signal; Dividing the first signal into a third signal and a fourth signal, and dividing the second signal into a fifth signal and a sixth signal; And adjust the fifth signal to obtain the seventh signal. Signal splitting may be performed by a circuit or component, such as a coupler or a power splitter, which is not limited herein. The phase of the fifth signal may be adjusted by a microstrip, a delay line, a variable capacitance diode, a phase shifter, or other circuit or component, which is not limited herein. The first circuit 401 further comprises an attenuation network and a combiner. The attenuation network is configured to attenuate the seventh signal and the third signal. The combiner is configured to combine the attenuated seventh signal and the attenuated third signal with the eighth signal. The combiner may be a circuit or component, such as a coupler or a power splitter, and is not limited in this respect. The combiner may further include a microstrip, a delay line, a variable capacitance diode, a phase shifter, or other circuit or component that performs phase adjustment on the attenuated third signal or the attenuated seventh signal, Or a phase splitter of a circuit or component such as a power splitter.

The second circuit 402 is basically the same as the second circuit 202 shown in FIG. 2, and will not be described in detail here again.

The attenuation network of the first circuit 401 may adjust the amplitudes of the seventh and third signals by attenuating the seventh and third signals. Referring to FIG. 5, when the amplitudes of the seventh signal and the third signal are changed, the phase of the eighth signal obtained after combining changes.

5, curve 1 shows the phase-phase curve of the eighth signal when the amplitude of the seventh signal is 1V, the amplitude of the third signal is 0.8V, and the phase shift of the fifth signal is 30 °. 5, curve 2 shows the phase-phase curve of the eighth signal when the amplitude of the seventh signal is 0.8V, the amplitude of the third signal is 1V, and the phase shift of the fifth signal is 30 °. The horizontal coordinate axis represents the decomposed phase of the modulated signal, and the vertical coordinate axis represents the phase of the eighth signal. As can be seen from Fig. 5, when the amplitude of the seventh signal and the amplitude of the third signal change, the phase of the eighth signal obtained after coupling changes. Therefore, the phase of the eighth signal can be controlled by installing an attenuation network to adjust the amplitude of the seventh signal and the amplitude of the third signal. Therefore, according to the radio frequency circuit provided in the embodiment shown in Fig. 4, the AM-PM characteristic of the eighth signal can be adjusted, the linear correction effect of the radio frequency circuit is improved, and the distortion of the output signal of the radio frequency circuit . The AM-PM characteristic means that the phase difference between the input signal of the amplifier and the output signal of the amplifier is changed due to the amplitude change of the input signal.

Alternatively, in this embodiment of the invention, a microstrip, other circuit or component, an attenuation network, and / or a combiner for adjusting the phase of the fifth signal may be implemented as a chip having amplitude modulation and / or phase modulation Can be replaced. This is not limiting in this embodiment of the invention.

Embodiments of the present invention further provide a transmitter including the radio frequency circuit described in FIG. 2 or FIG. The transmitter provided in this embodiment of the present invention may be used in a radio frequency portion of a base station, for example a remote radio unit (RRU), in a base transceiver station (BTS) , May be used in a user terminal, or in another communication device or device. This is not restrictive here.

6, an embodiment of the present invention further provides a base station, which includes a communication interface 601, a processor 602, a power supply 603, and a transmitter 604. The transmitter 604 is the transmitter described in the above embodiment. It will be appreciated that the base station provided in this embodiment of the present invention may further include some other structure such as a general purpose device, module, and circuit not shown in the figures.

Embodiments of the present invention further provide a user terminal that includes a memory 701, an external port 702, a transmitter 703, a peripheral interface 704, a processor 705, and a power supply 706). The transmitter 703 is the transmitter described in the above embodiment. It will be appreciated that the user terminal provided in this embodiment of the present invention may further include some other structure such as a general purpose device, module, and circuit not shown in the figures.

It will be appreciated by those skilled in the art that for the convenience and simplicity of explanation, it should be understood that the detailed process of the above-described systems, devices, and units may be understood by reference to the corresponding process of the above- I do not explain.

It goes without saying that, in the several embodiments provided in this application, the above-described systems, apparatuses, and methods may be realized in other ways. For example, the described apparatus embodiments are illustrative only. For example, the partitioning of a unit is merely a sort of logical functional partition, and may be in a different partitioning scheme during actual execution. For example, multiple units or components may be combined or integrated into different systems, or some features may be disregarded or not performed. Further, mutual coupling or direct coupling or communication connection shown or discussed may be realized through some interface. An indirect coupling or communication connection between a device or a unit can be realized in an electronic, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts depicted as units may or may not be physical units, may be located at one location, or may be distributed to a plurality of network units . Some or all of the units may be selected according to actual needs to achieve the object of the solution of the embodiment.

Further, the functional units in the embodiment of the present invention may be integrated into one processing unit, or each unit may physically exist alone, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

If the integrated unit is realized in the form of a software functional unit and is marketed or used as a stand-alone product, then this integrated unit can be stored in a computer-readable storage medium. On the basis of this understanding, essential technical solutions of the present invention or portions contributing to the prior art, or part of the technical solution, can be realized in the form of software products. The computer software product is stored on a storage medium and can be a computer software product (which may be a personal computer, a server, a network device, or the like) to perform some or all of the steps of the method described in the embodiments of the present invention. Lt; / RTI &gt; commands. The above-mentioned storage medium may be any storage medium capable of storing program codes, for example, a USB flash disk, a portable hard disk, a read-only memory (ROM), a random access memory RAM), a magnetic disk, or an optical disk.

Claims (10)

A radio frequency circuit comprising:
A first circuit and a second circuit,
The first circuit receives the first signal and the second signal, divides the first signal into a third signal and a fourth signal, splits the second signal into a fifth signal and a sixth signal, Adjust the phase to obtain the seventh signal, and combine the seventh signal and the third signal with the eighth signal,
The second circuit includes a primary power amplifier branch and a secondary power amplifier branch, wherein the primary power amplifier branch includes an outphasing circuit, the secondary power amplifier branch includes a secondary power amplifier, Wherein the outphasing circuit is configured to process the fourth signal and the sixth signal and the secondary power amplifier is configured to process the eighth signal. The method according to claim 1,
Wherein the first circuit further comprises a microstrip, the microstrip being configured to adjust the phase of the fifth signal, the length of the microstrip being proportional to the phase shift of the fifth signal, . 3. The method of claim 2,
The first circuit further comprising an attenuation network and a combiner,
Wherein the attenuation network is configured to attenuate the seventh signal and the third signal,
And the combiner is configured to combine the attenuated seventh signal and the attenuated third signal with an eighth signal. 3. The method of claim 2,
Wherein the first signal and the second signal are obtained by performing a phase decomposition on the modulated signal,
Here, the phase of the first signal is

And the phase of the second signal is

ego,

Is in the range of 0 to 90 and the amplitude of the first signal is equal to the amplitude of the second signal,

Is a time related function, t &gt; = 0, and t is a time. 5. The method of claim 4,
An eighth signal is input from the signal input terminal of the secondary power amplifier,
When the amplitude of the eighth signal reaches the signal threshold, the secondary power amplifier begins to perform amplification processing on the eighth signal, which is the minimum signal amplitude required to start the secondary power amplifier ,
The value of the conduction angle of the secondary power amplifier is greater than 120 degrees. The method of claim 3,
Wherein the first signal and the second signal are obtained by performing a phase decomposition on the modulated signal,
Here, the phase of the first signal is

And the phase of the second signal is

ego,

Is in the range of 0 to 90 and the amplitude of the first signal is equal to the amplitude of the second signal,

Is a time related function, t &gt; = 0, and t is a time. The method according to claim 6,
An eighth signal is input from the signal input terminal of the secondary power amplifier,
When the amplitude of the eighth signal reaches the signal threshold, the secondary power amplifier begins to perform amplification processing on the eighth signal, which is the minimum signal amplitude required to start the secondary power amplifier ,
The value of the conduction angle of the secondary power amplifier is greater than 120 degrees. A transmitter comprising a radio frequency circuit according to any one of claims 1 to 5. As a base station,
9. A base station comprising a transmitter according to claim 8, further comprising a communication interface, a processor, and a power supply. As a user terminal,
10. A user terminal comprising a transmitter according to claim 8, further comprising a memory, an external port, a radio frequency circuit, a peripheral interface, a processor, and a power supply.

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